Respuesta :
I would say John, as his favorite color is not mentioned directly
I believe John is the answer because
Karl likes math and can't be the blue guy cause he like math not science
Also it can't be Marcus because he like black and the science guy likes blue.
Answer John
Karl likes math and can't be the blue guy cause he like math not science
Also it can't be Marcus because he like black and the science guy likes blue.
Answer John